CN-111403363-B - Anti-loosening radiating fin and fixing element thereof

CN111403363BCN 111403363 BCN111403363 BCN 111403363BCN-111403363-B

Abstract

The invention relates to an anti-loosening radiating fin and a fixing element thereof, wherein the fixing element is provided with a fixedly connecting part and a welding pin, the fixedly connecting part is used for fixedly connecting with a radiating fin body, a first end of the welding pin is connected with the lower end of the fixedly connecting part, a clamping hook part is formed at a second end of the welding pin and is formed by a protrusion on the surface of a first side, a guide part is formed between the clamping hook part and the first end so that the clamping hook part and the first end are staggered in the width direction, when the welding pin is placed in a welding hole of a circuit board, the surface of a second side of the guide part is pushed by the inner wall of the welding hole so that the fixing element moves to the first side, the clamping hook part passes over the edge of the welding hole and hooks the circuit board when the radiating fin is completely inserted, and the welding pin cannot reversely deviate from the welding hole when the radiating fin is rocked, so that the connection strength of the radiating fin and the circuit board is ensured.

Inventors

CHEN WENQING
ZHENG QINGJING
LUO ZHENGYI
ZHAO FENG

Assignees

康舒电子(东莞)有限公司

Dates

Publication Date: 20260512
Application Date: 20190103

Claims (8)

1. A locking fin fixing element, comprising: A fixing part having an upper end and a lower end opposite to each other in a height direction; a welding pin having a first end and a second end opposite to each other along the height direction and having a width direction opposite to each other A first side and a second side, wherein the first end of the welding pin is connected with the lower end of the fixedly connecting part; The second end of the welding pin is provided with a clamping hook part, and the clamping hook part is formed by outwards protruding the first side of the welding pin; An oblique guide part is arranged between the first end of the welding pin and the clamping hook part, and the guide part staggers the first end of the welding pin and the clamping hook part in the width direction; Wherein the fixing element is a sheet-like element, and the fixing element further comprises: A clamping projection formed on the welding pin and protruding outwards along a thickness direction of the fixing element, wherein the clamping projection is provided with a top end; wherein, the hook part is provided with a top end; Wherein, the top of the clamping convex block and the top of the clamping hook part are positioned on the same horizontal height.
2. The anti-loosening heatsink mounting member of claim 1, wherein the soldering pin guide portion has opposite beveled edges formed by extending from a first side of the soldering pin toward a second side of the soldering pin.
3. The fixing element of the anti-loosening radiating fin as claimed in claim 1, wherein the first end of the soldering pin is formed with a connection section portion, the connection section portion being parallel to the height direction.
4. The fixing element of the anti-loosening radiating fin as claimed in claim 3, wherein the fixing portion is formed with a rivet perforation communicating opposite surfaces of the fixing portion in a thickness direction.
5. The fixing element of claim 3, wherein the fixing portion has a thermal resistance through hole formed on the fixing portion and connecting two opposite surfaces of the fixing portion in a thickness direction.
6. An anti-loosening cooling fin, comprising: A heat sink body; a fixing element according to any one of claims 1 to 5; the fixing element is fixedly connected with the radiating fin body through the fixedly connecting part, and the welding pins extend out of the radiating fin body; Wherein the fixing element is a sheet-like element, and the fixing element further comprises: And the clamping convex block is formed on the welding pin, protrudes outwards along the thickness direction of the fixing element, and is provided with a top end.
7. The anti-loosening heat sink as defined in claim 6, further comprising: A rivet; the radiating fin body is provided with a first riveting perforation, the fixedly connecting part of the fixing element is provided with a second riveting perforation, the first riveting perforation of the radiating fin body and the second riveting perforation of the fixing element are correspondingly arranged, and the rivet is arranged in the first riveting perforation and the second riveting perforation to fixedly connect the radiating fin body and the fixing element.
8. The anti-loosening heat sink of claim 6, wherein the heat sink body has at least one bolt hole.

Description

Anti-loosening radiating fin and fixing element thereof Technical Field A heat sink and a fixing element thereof, in particular to an anti-loosening heat sink and a fixing element thereof. Background High power active devices such as a transistor tend to generate a significant amount of thermal energy when activated, which if not properly removed or dissipated may result in damage to the device or circuit board due to excessive temperatures. Generally, a common heat dissipation method is to attach and fix a large-area metal heat sink on the surface of a resin package of a transistor, so as to dissipate heat energy generated by the transistor into an external space in a conductive manner through the heat sink with high thermal conductivity and large area, thereby avoiding the excessive temperature of the transistor. When the transistor is welded to the circuit board, the heat sink is also welded to the circuit board by a fixing element, so that the transistor and the heat sink can be firmly fixed to the circuit board. Referring to fig. 9, the fixing element 40 generally has a fixing portion 41 and a pin 42, and the fixing portion 41 is used for fixing the fixing element 40 to the heat sink 51. Referring to fig. 10, when the heat sink 51 needs to be soldered to a circuit board 52, the pins 42 of the fixing element 40 are disposed in a soldering hole of the circuit board 52, and further soldered, so that the heat sink 51 is fixed to the circuit board 52 by the fixing element 40, and damage caused by the transistor element connected to the heat sink 40 being pulled away from the circuit board 52 due to collision or vibration of the heat sink 51 with a large area is avoided. However, when the fixing element 40 is soldered to the circuit board 52, if the pins 42 of the fixing element and the circuit board 52 are connected by solder, the heat sink 51 has a larger area and a heavier weight than the transistor element, and when the circuit board 52 is vibrated as a whole, the shaking force path of the heat sink 51 is also larger, and the pins 42 are easily separated from the soldering holes of the circuit board 52, so that the function of fixing the heat sink 51 is lost. Therefore, the existing heat sink and its fixing element must be further improved. Disclosure of Invention In view of the fact that the conventional heat sink is easily detached from the soldering holes of the circuit board to cause the heat sink to lose its fixing and the electronic component pins connected to the heat sink are excessively stressed to be detached and damaged, the invention provides an anti-loosening heat sink and a fixing element thereof. The welding pin is provided with a first end and a second end which are opposite along the height direction, and is provided with a first side and a second side which are opposite along the width direction. The first end of the welding pin is connected with the lower end of the fixedly connecting part. The height direction is perpendicular to the width direction. Further, the second end of the soldering pin forms a hook portion, and the hook portion is formed by protruding outwards from the first side of the soldering pin. In addition, an oblique guiding part is arranged between the first end of the welding pin and the clamping hook part, and the guiding part makes the clamping hook part and the first end staggered in the width direction. The anti-loosening radiating fin comprises the fixing element and a radiating fin body, wherein the fixing element is fixedly connected with the radiating fin body through the fixedly connecting part, and welding pins of the fixing element extend out of the radiating fin body and are arranged in welding holes of a circuit board for further welding. The circuit board is provided with a first surface and a second surface which are opposite. When the second end of the welding pin is inserted into a welding hole of the circuit board from the first surface of the circuit board along the height direction, the clamping hook part of the second end can enter the welding hole first, and when the inner edge of the welding hole of the first surface of the circuit board is abutted against the guiding part, the fixing element is guided by the welding hole to move along the width direction from the second side to the first side. When the fixing element is completely inserted into the welding hole, that is, when the clamping hook part penetrates out of the second surface of the circuit board, the fixing element slides along the guide part so that the clamping hook part can be abutted against the second surface of the circuit board, and the fixing element hooks the circuit board with the clamping hook part. Further, since the hook portion is offset from the first end of the soldering pin in the width direction, when the hook portion hooks the circuit board, the first end of the soldering pin abuts against the inner wall surface of the soldering hole with the second side thereof,